{"id":"CVE-2024-9155","aliases":["EUVD-2024-49759","GHSA-h287-xx77-94v5"],"status":"published","title":"Insufficient Authorization On Unlinked Channel Files","description":"Mattermost versions 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2, 9.5.x \u003c= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00259,"percentile":0.17782,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2024-09-26T14:57:43Z","modified":"2026-10-28T02:31:09Z","products":[{"vendor":"mattermost","product":"mattermost"},{"vendor":"mattermost","product":"mattermost_server"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-9155","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-h287-xx77-94v5"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/9xxx/CVE-2024-9155.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-9155","title":"Insufficient Authorization On Unlinked Channel Files","description":"Mattermost versions 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2, 9.5.x \u003c= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.","status":"published","published":"2024-09-26T14:57:43.987Z","modified":"2024-09-26T15:17:25.819Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:34:06.147811Z"}],"euvd":[{"id":"EUVD-2024-49759","description":"Mattermost versions 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2, 9.5.x \u003c= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.","status":"published","published":"2024-09-26T14:57:43Z","modified":"2024-09-26T15:17:25Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T00:28:09.516714Z"}],"ghsa":[{"id":"GHSA-h287-xx77-94v5","title":"Mattermost versions 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2, 9.5.x \u003c= 9.5.8 fail to limit access to...","description":"Mattermost versions 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2, 9.5.x \u003c= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.","status":"published","published":"2024-09-26T15:30:44Z","modified":"2024-09-26T15:30:49Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:58:21.32771Z"}],"nvd":[{"id":"CVE-2024-9155","description":"Mattermost versions 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2, 9.5.x \u003c= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.","status":"published","published":"2024-09-26T15:15:18.06Z","modified":"2026-06-17T08:24:03.56Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:10:29.044588Z"}],"osv":[{"id":"CVE-2024-9155","title":"Insufficient Authorization On Unlinked Channel Files","description":"Mattermost versions 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2, 9.5.x \u003c= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.","status":"published","published":"2024-09-26T14:57:43.987Z","modified":"2026-10-28T02:31:09.075756451Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:44:45.712478Z"}]}}